Novak Djokovic uses Head tennis rackets. His equipment history includes several Head models, although professional players often use customized frames beneath a commercially available paint design.
Djokovic began his professional career using the Head Liquidmetal Radical. He switched to Wilson in 2005, but he could not find a Wilson racket that matched the feel of his earlier equipment, so Wilson produced a custom frame based on that design. After the 2008 season, he re-signed with Head and introduced the Head YouTek Speed Pro paint job at the 2009 Australian Open.
He later used Head YouTek IG Speed and Head Graphene Speed Pro paint jobs. His setup has also been associated with a hybrid string arrangement: natural gut in the mains and Luxilon Big Banger ALU Power Rough in the crosses. The common mix-up is naming a specific model as though it were the brand; Head is the canonical answer to this question.